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From 1846c7a35d1091d3b6140c56befd7fee0a91dcbb Mon Sep 17 00:00:00 2001
From: Love Hornquist Astrand <lha@h5l.org>
Date: Mon, 8 Apr 2013 10:15:15 -0700
Subject: [PATCH] make @iftex case work in texinfo-5.1
---
doc/whatis.texi | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/doc/whatis.texi b/doc/whatis.texi
index 8c1f45d..891e275 100644
--- a/doc/whatis.texi
+++ b/doc/whatis.texi
@@ -35,10 +35,11 @@ services can authenticate each other.
@end macro
@end ifinfo
-@tex
-@def@xsub#1{$_{#1}$}
-@global@let@sub=@xsub
-@end tex
+@iftex
+@macro sub{arg}
+@textsubscript{\arg\}
+@end macro
+@end iftex
@ifhtml
@macro sub{arg}
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